Gas-cleaning device.



W. H. STEVENS. GAS CLEANING DEVICE. APPLICATION FILED OCT. 27. 1915.

Patented May16,1916. P15. I 1 1 46,41 "*7 -5 :5- 1.5 "y

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WILLIAM H. STEVENS, OF BELLAIRE, OHIO.

GAS-CLEANING DEVICE.

Application filed October 27, 1915.

T 0 all whom 2'2, may concern:

Be it known that I, WILLIAM H. STEVENS, a citizen of the United States of America, and resident of Bellaire, county of Belmont, and State of Ohio, have invented certain new and useful Improvements in GasCleaning Devices, of which the following is a specification.-

This invention relates broadly to dust removers, and more specifically to a gascleaning device.

The chief object of the invention is to provide an apparatus designed primarily as a cleaner for blast-furnace gas, whereby dust and solid particles of foreignmatter carried in suspension by gas or air may be effectually removed.

A further object is to provide a device of the character mentioned which is extremely simple and durable in its construction and which is comparatively inexpensive to construct and install.

With these and other important objects in view, the invention resides in the features of construction, arrangement of parts and combinations of elements which will hereinafter be fully described, reference being had to the accompanying drawings,

'forming a part of this specification, in

which Figure 1 is a top plan view of the inven tion; Fig. 2 is a longitudinal section of the same; Fig. 3 is a rear end elevation; Fig. 4

is a transverse section on line H, Fig. 1; and Fig. 5 is a detail view partly in side elevation and partly in section, of the screen.

Referring to said drawings, in which like designating characters distinguish like parts throughout the several views -l indicates a casing within which operates a bladed fan 2 of blower type, said fan being mounted upon a suitably driven shaft, as the shaft to discharge through the vent 5- of said casing the gas collected within said'casing.

6 indicates generally a casing, preferably of rectangular form, located on a lower level than the casing 1 and having disposed intermediate its ends a vertical wall or partition 7 which divides theinterior thereof into two separate chambers 8 and 9, the former constituting a gas-receiving chamber and the latter a filtering chamber. The chamber 9 is in opencommunication with the fan chamber through a curved passage Specification of Letters Patent.

Patented May 16, 1916.

Serial No. 58,248.

1.0 connecting an opening 11 provided in the top of said chamber 9 at the end opposite the partition 7 to an opening 12 provided in the adjacent side of the fan chamber. Thus, as is obvlous, rotation of the fan produces a suction for withdrawing air from said chamber 9. Said passage 10 is preferably formed by-bolting to the casing 6 and to the casing 1 the substantially triangular s1des and the overlying curved .top of an inclosure member 13, the removal of which permits free access to the fan chamber.

Located over the casing 6 is a longitudinally movable hollow slide-member or casing 14 which, in its normal position, is in open communication with both chambers 8 and 9 permitting communication therethrough between said chambers. In another position, said. slide-member closes commu- 7 connected to the upper ends of similar tubular members 18' and 19 which extend upward from the casing 6 at opposite sides of the partition 7. Apertures 20 and 21 are provided in the bottom 14 of the slidememher, the same being relatively so disposed that the aperture 20 will register with the I vertically alined passages through tubular members 16 and 18 when the aperture v21 registers with the vertically alined'passages through tubular members 17 and 19. The bottom 14: of the slide member 14 is 'extended laterally beyond the sides ofthe latter and has its lateral edges shaped to 3 of an electric motor 4, and being designed tends vertically through the filtering chamber 9 and has its lower end seated in encircling relation to an aperture 25 provided in the bottom of the casing 6, said leo aperture opening into an underlying dustcollecting chamber 26.

In practice, the gas to be cleaned is delivered to chamber 8, entering through a suitably located pipe 27. The suction created by the fan 2 rotating in the interior of casing 1 acts to draw the gas upward from said chamber 8 into the interior or slidemember 11, through the registering passages which lie in alinement with aperture 20; thence the gas travels vertically downward from said slide-member through the aperture 21 thereof to the interior of the vertical screen, whence it passes through the fabric 23 to the interior of the filtering chamber 9 and thence through the passage 10 to the fan chamber, whence it is directed by the fan through the discharge leg or vent 5 of easing 1 to a suitable conduit (not shown) leading to the consumption point.

The suction created by the fan is such that the gas travels with considerable velocity, and, due to the momentum gained in passing vertically downward into the tubular screen, much of the dust or the heavier particles thereof, carried in suspension is directed through the aperture 25 into the dust-chamber or receptacle 26. Said receptacle is normally wholly closed except for said aperture 25, and, consequently, dust deposited therein lies practically undisturbed by the action of the fan. The fabric 23 further acts to screen the dust from the gas, preventing the same from passing therethrough to the filtering chamber 9,

resulting in said gas being effectually freed of solid foreign matter.

For facilitating the removal of dust collected in the chamber 26, a saucer or funnelshaped bottom 28 is provided in the latter, the same having an opening 29 therein in which a valve 80 is normally seated. Said valve is carried upon the end of a suitable lever 31 whereby it may be unseated as oocasion requires for permitting the collected dust to drop to an underlying pit, sewer, or the like.'

When access to the screen is desired, as when the same is to be removed or replaced, or when it is desired for any reason to cut off the passage of gas through the apparatus, the slide-member 14 is moved outward until the upper end of said screen is wholly uncovered. At such point said slide completely cuts off the passage of gas, as is clearly apparent upon inspection of Fig. 2 of the drawings. Said slide-member thus constitutes in effect a valve of the D-slide type. For vacillating movement of said slide-member or valve, mechanical sliding mechanism of any preferred character may be employed, the example of such mechanism illustrated in the drawings comprising a horizontally disposed jack-screw 32 disposed parallel to said slide member and having its ends journaled in suitable bearings 33 provided on the casing 6. Said screw is threaded through lugs 34 carried on the side of said slide-member and is adapted to effect longitudinal movement of the latter in an outward or inward direction according to the direction of its rotation. A crank or hand-wheel 35 is provided on the outer end of said jack-screw for facilitating r0- tation thereof.

lVhile the apparatus herein shown and described is designed primarily for cleaning blast furnace gas, it will be understood that it is not limited to such use, but may be applied to gas derived from any source.

As is obvious, the fan may be dispensed with, in which case the gas will pass through the apparatus under its own pressure and the cleaning action will remain the same.

It will be apparent that air may be direct ed into the fan chamber for mixing with the gas, in which case the fan will act to thoroughly mix the gas and air for facilitating combustion at the combustion point.

What is claimed is- 1. An apparatus of the character described, comprising a filtering chamber, means for creating a suction for withdrawing gas from said chamber, said chamber having top and bottom openings therein, a screen extending through said chamber and connecting said openings, a dust collecting chamber underlying the bottom opening of said filtering chamber, a gas-receiving chamber associated with said filtering chamber and having an opening in its top, and means movably mounted over said gas-receiving and filtering chambers whereby gas is conducted from the top opening of the former to that of the latter, said means being adapted for movement to a position wherein communication between the last-mentioned chambers is out 0H.

2. An apparatus of the character described, comprising a filtering chamber, said chamber having top and bottom openings therein, a screen extending through said chamber and connecting said openings, a dust collecting chamber underlying the bottom opening of said filtering chamber, a gas-receiving chamber associated with said filtering chamber and having an opening in its top, and a slide-member of D-slide valve type associated with the top openings of said gas-receiving and filtering chambers whereby communication between said chambers through said openings may be established and cut off.

3. An apparatus of the character described, comprising a filtering chamber, said chamber having top and bottom openings therein, a screen extending through said chamber and connecting said openings, a dust collecting chamber underlying the bottom opening of said filtering chamber,

a gas-receiving chamber associated with said filtering chamber and having an opening in its top, a slide-member of D-slide valve type associated with the top openings of said gas-receiving and filtering chambers whereby communication between said chambers through said openings may be established and cut off, and hand-operated means for sliding said slide-member.

4. An apparatus of the character described, comprising a filtering chamber, said chamber having top and bottom openings therein disposed in vertical alinement, a screen extending through said chamber and connecting said openings, a dust-collecting chamber underlying the bottom opening of said filtering chamber, a gas-receiving chamber associated with said filtering chamber and having an opening in its top, and a hollow slide-member slidably mounted over the top openings of said gas-receiving and filtering chambers, said slide-member being designed to normally occupy a position affording communication therethrough between said top openings and being movable to a position wherein said communication is cut off.

5. An apparatus of the character described, comprising a filtering chamber, said chamber having top and bottom openings therein disposed in vertical alinement, a screen extending through said chamber and connecting said openings, a dust-collecting chamber underlying the bottom opening of'said filtering chamber, a gas-receiving chamber associated with said filtering chamber and having an opening in its top, and a hollow slide-member slidably mounted over the top openings of said gas-receiving and filtering chambers, said slide-member being designed to normally occupy a position aflording communication therethrough between said top openings and being movable to a position removed from overlying relation to the top opening of the filtering chamber.

6. An apparatus of the character described, comprising a filtering chamber, said chamber having top and bottom openings therein disposed in vertical alinement, a screen extending through said chamber and connecting said openings, a dust-collecting chamber underlying the bottom opening of said filtering chamber, a gas-receiving chamber associated with said vacuum chamber and having an opening in its top, and a hollow slide-member slidably mounted over the top openings of said gas-receiving and filtering chambers, said slide-member being designed to normally occupy a position afiording communication therethrough between said top openings and being movable to a position wherein the top opening of the filtering chamber is uncovered, permitting access to the latter for removing said screen.

7. An apparatus of the character described, comprising a filtering chamber, said chamber having top and bottom openings therein disposed in vertical alinement, a screen extending through said chamber and connecting said openings, a dust-collecting chamber underlying the bottom opening of said filtering chamber, said dust chamber having a valve-closed bottom, means for opening said valve to discharge collected dust from said dust chamber, a gas-receiving chamber associated with said filtering chamber and having an opening in its top, and a hollow slide-member overlying the top openings of said gas-receiving and filtering chambers and designed to permit communication therethrough between the gas-receiving chamber and the filtering chamber, said slide being adapted for movement to a position wherein said communication is cut off.

In testimony whereof, I afiix my signature in presence of two subscribing witnesses.

WILLIAM H. STEVENS.

Witnesses:

W. O. STEVENSON, H. E. DUNLAP.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. O. 

